塔里木盆地北缘库车前陆褶皱──冲断构造分析  

STRUCTURAL ANALYSES OF KUQA FORELAND FOLD-THRUST BELT ALONG THE NORTHERN MARGIN OF TARIM BASIN

作　　者：贾东[1] 卢华夏 蔡东升[1] 陈楚铭[1] 

机构地区：[1]南京大学地球科学系,南京210093

出　　处：《大地构造与成矿学》1997年第1期1-8,共8页Geotectonica et Metallogenia

基　　金：国家"八五"科技攻关项目!<塔里木盆地构造特征>(85-101-01-01)专题研究的一部分。

摘　　要：库车前陆褶皱－冲断带是以断坪－断坡式的台阶状逆断层作为滑动机制的盖层薄皮推覆构造，它们在剖面上形成一个向南变薄尖灭的推覆构造楔，底部沿脱面在北侧深南侧浅，推覆变形也是自北向南传递。依据其构造形态和变形特点可分为五个构造亚带：（1）南天山前缘楔状构造带；（2）库姆格列木－依奇克里克断层扩展褶皱构造带：（3）吐格尔明－吉迪克断层弯曲褶皱构造带：（4）秋里塔格断层扩展褶皱与断层弯曲褶皱叠加构造带；（5）库车－亚肯生长断层弯曲褶皱构造带。The Kuqa foreland fold-thrust belt displays the thin-skin nappe structures in the cover strata, which are characterized by the flat-ramp and step reversal faults. The nappe structures show a thinned southwards tectonic wedge in cross-sections, which detachment surface is shallowed from north to south and the nappe deformation has been propagated towards the south. Based on structural styles and deformation features, the Kuqa fold-thrust belt can be divided into five structure sub-belts; (1) South Tianshan frontal wedge sub-belt, (2) Ku mugelinemu-Yiqikelike fault-propagation fold sub-belt, (3) Tugerming-Jidike fault-bend fold sub-belt, (4) Qiulitage fault-propagation fold and fault-bend fold superimposed structure sub-belt, (5) Kuqa-Yaken growth fault-bend fold sub-belt.

关 键 词：塔里木盆地 盆地 褶皱 冲断带 断层 

分 类 号：P542.3[天文地球—构造地质学] P542.2[天文地球—地质学]